Molding-machine



Eo. BEARDSLEY AND w. P. PIPER.l

MOL'DING MACHINE. APPLICATION FIL'ED IuNE 28, 1919.

1,337,585. V Patented Apr. 20, 1920.

3 SHEETS-'SHEET I.

E. 0. BEARDSLEYvND W. F. PIPER.

MOLDING MACHINE.

APPLICATION FILED JUNE 28.19I9.

Patented Apr. 20, 1920.

3 SHEETS-SHEET 2.

:buzz"fz/L7M E. 0. BEARDSLEY AND W. F. PIPER.

MOLDING MACHINE.

APPLICATION FILED IuNE 28,1919.

Patented Apr. 20, 1920.

3 SHEETS-SHEET 3.

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ELHERO. BEARDSLEY, OF CHICAGO, AND WALTER F. PIPER, OF OAK PARK,ILLINOIS.

HOLDING-MAGHpIN E.

. Bpecication of Letters Patent.

Application tiled June 28, 1919. Serial No. 307,319.

' To all whom z't mag/concern:

Be it knownthat we, Enma O. Enanos- LEY and WALTER F. PIPER, bothcitizens of the United States and residents of Chicago, in the county of(,look and State of -Illino1s, and Oak Park, in the county of Cook andState of Illinois, respectively, have inventedcertain new 'and usefulImprovements in Moldin -Machines of which the following is a fu clear,and exact description.

The invention relates to molding apparatus and more particularly to thattype 1n which the sand or mold-material is forcibly projectedA into aflask by a rotor. An example of such apparatus is set forth in PatentNo. 1,309,833, dated July 15, 1919.

The present object of the invention is to provide means forautomatically controlling the path of movement of a laterally movableprojector-head so that it will be operated to project sand into allportions of a flask to properly form a mold in accord- -ance with thepattern in the flask. In making molds with a projector-head, it has beenfound possible to operate the head through a predetermined path vinaccordance with the pattern, so that the necessity of manuallycontrolling the movement of the projector-head vcan be dispensed with.

A further object of the invention is to provide a controlling apparatuswhich may be readily changed to adapt it for operating theprojector-head for making molds which' are diiierent in shape. A

The invention consists in the several novel features hereinafter setforth and more particularly deined by claims at the conclusion hereof.

In the drawings: Figure 1 is a side elevation of a machine embodying theinvention. Fig. 2 is a side view of the ramming head, the case beingshown in section on line 2,-2 of Fig. 1. 3 is a vertical longitudinalsection. Fig. 4 is a detail of one of the controlling cams. Fig. 5 is aplan. Fig. 6 is a side elevation. Fig. 7 is a section taken on line 7-7of Fig. 5.

The invention is illustrated as embodied in a machine comprising a mast10 which is provided at its upper end with a post 11 on which isjournaled, for horizontal rotation,

a tubular jib 12. which has a socket 13l around the standard 11.Anti-friction .bearings 13 are provided between post 11 ming headsustained thereb can swing hori, zontally and relatively to the jib. Thepivotal connection between the arm and the )1b.cons1sts of a hollowbracket 1 5 or socket on the jib and a post 16 which is fixed to the arm14 and mounted in anti-friction bearings 17 in said bracket. This formof connection4 makes it possible to locate the arm immediately below thejib. The casing 20 of an electric motor 21 is bolted to a bracket 22 onthe lower end of post 11 and arm 14 comprises a hollow sleeve 23 whichis bolted to one side of the motor-casing 20 and supports the ramminghead and serves also as an inclosure for the shaft 24 which extendsbetween the electric motor 21 and the rotor of the ramming head. Thisshaft is mounted in a bearing 25 in the outer end of the sleeve 23 and abearing 26 adjacent the inner end of the sleeve. The rotor for the sandfor filling the molds is fixed to the outer end of shaft 24.

A yoke comprising a hub 28 which is fixed to the sleeve 23, and arms 28which have outwardly extending members 29 support the casing or statorof the ramming head. The casing has an arcuate or peripheral wall 30 andan integral outer side wall 31. The inner side of the casing or statoris open. This casing is bolted to the yoke.

A conveyor-chute 37 containing a suitable sieve or riddle 38 issupported from the jib 12 by resilient bars 39 which have their endsrespectively secured to theV jib and to the chute. r:The inner 9nd ofchute 37 is adapted to receive -sand from a suitable source of supply,such as a hopper 40 to which sand will be fed in anydesired manner. Theouter end of chute 37 discharges into the upper open end of an inclinedchute 35 which is fixedly mounted on the arm 14, and is supported bybars 36 so that the relation between the arm, chute 35 and the ramminghead remains fixed. The upper end of the chute 35 and the outer endofthe chute 37 are alined with the axis about which the arm 14 swings,so that the relative movement of the chutes will maintain the dischargeinto the chute 35. The chute 37 and the riddle therein are vibrated by apitrnan 41 which is pivoted to chute 3 .operates shaft 43 and eccentric42.

.mounted on said bracket and a pinion on the ously by gravity.

The chute 35, as more clearly seen in Figs. 2 and 3, discharges into theopen inner side of the ramming head. The rotor is adapted to receive thesand at the openv side of the head and to project 'it downwardly intothe mold, and comprises a hub 5() and a cylindrical body 51, integralwith the hub and secured to shaft 24, 'an inclined guldefiange 52 whichis flared inwardly from the periphery of the inner side of thecyhndrical body 51 and directs the sand onto the body 51. A curvedoutwardly extending bed 54, integral with the rotor body, 1s adapted tosupport the projector-blade 5.5. Said blade is curved to fit the bed 54and 1s provided with an inner side wall 56 which has a curved edge 57and is adapted to function as a positive shear-blade for the sand, sothat as the rotor is revolving, the wall 56 will shear a portion of thesand issuing from the lower end of the chute from the sand in the chute.The rotor is operated at a high speed and its curved base andcentrifugal force cause the wad of sand which has been separated fromthe supply in the chute 35 to wedge and impact itself in the cornerbetween the outer end of the plate and the arcuate wall 3() of thecasing, so that before the wad reaches the point of discharge, at 60, itwill have been densified and packed into a proper mass for projectioninto the mold. This construction of ramming head is peculiarly adaptedfor high speed operation, such as has been found necessary to form goodmolds.

A protective housing 61, which is out of contact with the rotor, issuspended from the extensions 29 ofthe supporting yoke. The inner sideof the stator is open and the wall 30 of the stator or casing begins ata point which is reached by the projectorL blade shortly before itreaches the incoming sand stream from chute 35 and terminates at 60,where the wad will be discharged truly downward into vthe mold. If thatportion of the housing adjacent the discharge point is substantiallyalined with the casing where the wad is released, great wear occurs andthis is measurably overcome by offsetting the wall 64 of the protectivehousing, so that it will be disposed in off-set relation with respect tothe discharge point 60. A three- The automatic mechanism for controllingthe path of movement of the projector-blade 4 and the placement of thesand into different portions of a flask comprises mechanism forautomatically moving and controlling the jib and mechanism forautomatically moving and controlling the arm 14 and by compounding themovements produced by these mechanisms any desired path of movement maybe given to said head. A housing 61a is secured to the jib 12 andacross-shaft 62 is journaled in said housing. A worm-gear 63 in saidhousing is keyed to shaft 62. A worm 64 on an inclined shaft 65l whichhas its lower end mounted in housing 61a and its upper end in bracket 45drives gear 63. A ybevel-gear 66 on shaft 43 meshes with a similar gear67 on the upper end of shaft El to drive the gearing in housing 61awhich is adapted to operate the controlling mechanisms for the jib l2and arm 14. A gear 68 -rigid with the socket 13 of the'jib is operatedto rotate the jib by a rack 69 which meshes with said gear, is slidablysupported on and by the jib and has a roller 70 at its outer end whichis operated by a cam 71 on shaft 62. Cam 7l is provided with a groove 72which is shaped to impart movement to the jib and in accordance with thepath of movement of the jib which is necessary to ram and fill a flask,and in accordance with the pattern in the flask. For eX ample, if anarcuate'movement alone was desired, cam 71 would be formed toreciprocate the rack 69 to oscillate the jib within the desired limits.A gear 74 is rigid with the bracket 22 of the arm 14. A rack 75 isslidably mounted on the j ib 12, meshes with gear 74, and hasva roller75a at its inner .end which extends into a groove 76 in a camy 77 whichis secured to rotate with cross-shaft 62. This cam 77 and gearing areadapted to automatically operate and control the path of movement of thearm 14 relatively to the jib. The cam may be formed of any suitableshape and to swing the arm in any .regular or irregular path. Cams 71and 77 are changeably secured to shaft 62 so that cams of differentshapes my be substituted which are adapted to impart differentcharacters of movements or different strikes according to the pathnecessary to cause the projector head to traverse all portions of theflask which may be necessary to form Athe molds around differentpatterns or lill different flasks. The cams are simultaneously operatedso that movements of the jib and arm will be compounded and by usingdifferent cams and different relative timing between the gearings,substantially any desired path of movement may be provided for the headat the-outer end of arm 14. This construction exemplifies mechanism forautomatically operating a projector-head in a horizontal plane and inany predetermined path,

Lacasse according to the cams employed, and adapt the machine forautomatic operation so that an operator for guiding and controlling thepath of movement of the head will be dispensed with. l,

In the operation of the machine, the flask 80 is placed beneath andwithin rangefyof movement of the ramming head and approximately aboutafoot below the lower Aend of the head.

The delivery of the sand from the chutebetween the delivery anddischarge points of the stator. The operation of this apparatus at thehigh speed indicated-has been found, in practice, to produce good moldsvery rapidly. l/hen the rotor reaches the discharge terminal 60 of thestator, the wads of sand will be released and will be projecteddownwardly into the ilask.

While the projector is operating, the cams 7l and 77 and the gearingsfor the jib 12 and arm 14.- respectively operated thereby, will swingthe ib and arm without attention on the part of the operator to causethe head to move in the path necessary to properly fill the flask andpack the sand around all portions of the pattern in the flask, so as toform a god mold.

A characteristic of supporting the ramming head by a jib and arm whichare pivotally connected so as to permit onlylateral movement, and whichpermitthe ramming head to be moved laterally to discharge the sand intoall portions ofy the flask, is that the angle of delivery of the sandinto the flask is not varied by the movement of the ramming head to fillall parts of the flask. In practice, it has been found that the mosteiicient angle of delivery is substantially vertical when the flask ishorizontal, because at such angle of delivery, the wads willsuccessively pack in or build up the mold with the least displacement ofthe previously delivered sand in the mold. When the angle of delivery issubstantially obtuse or acute with respect to the plane of the mold, the

wads of sand, when projected into the flask at high speed will tend todisplace and disrupt the sand which has been previously delivered intothe mold.

The invention exemplifies a molding machine provided with aprojector-head and mechanism for automatically controlling. its

movement to fill a flask and form a mold, ih which manual control for,and movement of, the head are dispensed with.

The invention is not to be understood as restricted to the details setforth, since these may be modified Within the scope of the appendedclaims, without departing from the spirit and scope of the invention.

, Having thus described the invention, what we claim as new and desireto secure by Letters Patent, is:

1. In a molding machine, the combination of a projector for themold-material, mechanism for driving the projector, means to movablysupport .the projector and mechanism for automatically controlling thepath of movement of the projector over a flask.

tion of a projector for the mold-material,

mechanism for driving the projector, means to movably support theprojector, and mechanism for automatically moving the projector over aflask to make a mold and controlling the path of movement.

3. In a molding machine, the combination of a projector for the moldmaterial, mechanism for driving the projector, means to movably supportthe projector, comprising an arm and mechanism for automaticallycontrolling the movement of said arm.

4. In a molding machine, the combination of a projector for themold-material, mechanism for driving the projector, means to movablysupport the projector comprising a plurality of pivotally movableelements, and mechanism -for moving and automatically controlling thepath of movement of said elements.

5,'In a molding machine, the combination of a projector for themold-material, mechanism for driving `the projector, means to movablysupport the projector, `and mechanism comprising a cam for automaticallycontrolling the path of movement of the projector over a flask.

6. In a molding machine, the combination of a projector for themold-material,

mechanism for driving the projector, means .ing a plurality of pivotallymovable elements and mechanism 4for moving and automatically controllingthe path of movement v of said elements comprising cams.

8. In a molding machine, the combination of a projector for themold-material, mechanism for driving the projector, means to movablysupport the projector comprising a jib and an arm pivoted-to the outer yend of the jib, means for automatically operating and controlling themovement of to movably support the projector, compristhe jib, and meansfor automatically oper-sn ing a plurality of plvotally movable eleatingand controlling the movement of the arm.

9. In a molding machine, the combinaytion of a projector for themold-material,

mechanism for driving the projector, means to movably support theprojector and power-operated mechanism for automatically controlling thepath of movement of the projector over a flask.

l0. In a molding machine, the combination of a projector for themold-material, mechanism for driving the projector, means to movablysupport the projector and power-operated mechanism for automaticallymoving the projector over a flask to make a mold and controlling thepath of movement.

11. In a molding machine, the combination of a' projector for themold-material, mechanism for driving the projector, means to' movablysupport the projector compris-` ing an arm', and power-operatedmechanism for automatically controlling the movement of said arm.

l2. In a molding machine, the combination of a projector for themold-material,

mechanism for driving the projector, means ments, and power-operatedmechanism for moving and automatically controlling the path of movementof'said elements.

13. In a molding machine, the combinationA of a projector for the.mold-material, mechanism for drivin the projector, means to movablysupport t e projector comprising a jib and an arm pivoted to the outerend of the jib, power-operated means for automatically operating andcontrolling the movement of the jiban'd means for automaticallyoperating and controlling the movement of the arm. j

14. In a molding machine, the combination ofv a projector for themold-material, mechanism fordriving the projector, means .to movablysupport the projector comprising a jib and an arm pivoted to the'outerend of the jib, poWer-operated-means for automatically operatmg andcontrolling 1 the movement of the jib, and power-operated means orautomatically operating and controlling the movement of the arm.

l ELMER O. BEARDSLEY.

WALTER F. PIPER.

